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View Full Version : My PCM prep for the chip arriving tomorrow


Robert6401
Wed, February 17th, 2010, 09:18 PM
You guys tell me if this looks clean of silicon:

http://i636.photobucket.com/albums/uu88/Robert6401/PCM%20prep/100_3715.jpg
http://i636.photobucket.com/albums/uu88/Robert6401/PCM%20prep/100_3719.jpg
http://i636.photobucket.com/albums/uu88/Robert6401/PCM%20prep/100_3720.jpg

And this is how I cut the holder bracket to allow for room for the chord. Having never seen an installed chip before, I don't know if this is a big enough hole for it or not.

http://i636.photobucket.com/albums/uu88/Robert6401/PCM%20prep/100_3723.jpg
http://i636.photobucket.com/albums/uu88/Robert6401/PCM%20prep/100_3725.jpg


How do they look?????

Edit: HAHA, I just noticed the bottle of Jack in the last picture! Well,that's my wife's favorite drink when watching Lost, I'm more of a beer man myself!

cleatus12r
Wed, February 17th, 2010, 09:38 PM
Actually, Bob, those traces look a little TOO clean. You may actually have issues with the thickness of the board. :matt-roloff:

You need to cut a little bit more of the holder out to the top (left side of the photo) and get rid of the top mounting bolt boss and then you'll be good to go. You only need one bolt holding the PCM holder in place anyway (and the bottom bolt happens to have the metal tab in it). ;)

cleatus12r
Wed, February 17th, 2010, 09:39 PM
I am going to move a few of these posts to the Phoenix section, so look for them there from now on.

Robert6401
Wed, February 17th, 2010, 09:41 PM
Actually, Bob, those traces look a little TOO clean. You may actually have issues with the thickness of the board. :matt-roloff:

Are you serious about this part? I didn't use anythng but my fingernail and toothpicks to clean between the fingers of the connector. :sigh:

cleatus12r
Wed, February 17th, 2010, 09:44 PM
They look copper color in the pictures. Are they still silver? If they're still silver then you have nothing to worry about.

I use my fingernails too.

Robert6401
Wed, February 17th, 2010, 09:46 PM
yeah, I think thats just the flash. They arent copper colored at all, they are totally silver. I was more concerned about whether or not they looked free of silicone.

cleatus12r
Wed, February 17th, 2010, 09:48 PM
Yeah, they look really good then, Bob. I was serious about being too clean. Most folks will sand all of the tinning off of the traces and then the chip terminals won't make good contact due to the thickness problem....you'll see what I mean when you get the chip.

Robert6401
Wed, February 17th, 2010, 09:49 PM
With regards to the hole in the pcm holder, I thought I was best off going conservative tonight, and then if I have to cut more off tomorrow thats fine. I just didnt want to go too far tonight

cleatus12r
Wed, February 17th, 2010, 09:52 PM
You won't get the chip in there........

Not trying to be sarcastic or negative, but it won't go.

ON EDIT:

My daily driver test mule doesn't even have a holder on it. I change the PCM so often that I just let it rest right on the metal bracket.

Robert6401
Wed, February 17th, 2010, 09:53 PM
Yeah, they look really good then, Bob. I was serious about being too clean. Most folks will sand all of the tinning off of the traces and then the chip terminals won't make good contact due to the thickness problem....you'll see what I mean when you get the chip.

Well, correct me if Im wrong, but I cant imagine that its physically possible to sand the tinning off with just a thumbnail.

cleatus12r
Wed, February 17th, 2010, 09:55 PM
It's tough but most people use scotch brite pads and that will take the tinning off in a hurry.

Robert6401
Wed, February 17th, 2010, 09:57 PM
You won't get the chip in there........

Not trying to be sarcastic or negative, but it won't go.

ON EDIT:

My daily driver test mule doesn't even have a holder on it. I change the PCM so often that I just let it rest right on the metal bracket.

No worries, I will just trim some more.

Robert6401
Wed, February 17th, 2010, 10:02 PM
It's tough but most people use scotch brite pads and that will take the tinning off in a hurry.


HAHA, yeah, I haven't even gotten the scotchbrite pad from PHP yet, and I wasnt about to use something unapproved! I am just anxious. Tell me, do I need to run the PHP supplied scotchbrite pad across that? or did it look good to go considering there is no copper showing?

Robert6401
Wed, February 17th, 2010, 10:36 PM
Ok Cody, its not as pretty as it was before, but I cant imagine that this won't work

http://i636.photobucket.com/albums/uu88/Robert6401/PCM%20prep/100_3728.jpg

cleatus12r
Wed, February 17th, 2010, 10:50 PM
In the words of Larry the Cable guy......

That'll "Git 'er done".

Robert6401
Wed, February 17th, 2010, 11:22 PM
Thanks for all the help Cody. Tomorrow evening cant come soon enough!